Bathymetric chart of the North-Western Indian Ocean (In Russian; English abstract)

1966 ◽  
Vol 13 (5) ◽  
pp. 1028
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
English Abstract ◽  
The North ◽  
North Western

First occurrence of the moray eel Gymnothorax prolatus Sasaki & Amaoka, 1991 (Teleostei: Anguilliformes: Muraenidae) from the northern Indian Ocean

2015 ◽  
Vol 8 ◽  
Author(s):  
Anil Mohapatra ◽  
Dipanjan Ray ◽  
David G. Smith
Keyword(s):  
Indian Ocean ◽  
Arabian Sea ◽  
Western Indian Ocean ◽  
Northern Indian Ocean ◽  
The North ◽  
First Occurrence ◽  
The Indian Ocean ◽  
First Time ◽  
North Western ◽  
Moray Eel

Gymnothorax prolatusis recorded for the first time from the Indian Ocean on the basis of four specimens collected in the Bay of Bengal off India and one from the Arabian Sea off Pakistan. These records extend the range of the species from Taiwan to the north-western Indian Ocean.

Pontoniine shrimps (Decapoda: Palaemonidae) from the island of Socotra, with descriptions of new species of Dactylonia Fransen, 2002 and Periclimenoides Bruce, 1990

Zootaxa ◽  
2006 ◽  
Vol 1137 (1) ◽  
pp. 1 ◽  
Author(s):  
A. J. BRUCE
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Present Report ◽  
Western Indian Ocean ◽  
North West ◽  
The North ◽  
First Occurrence ◽  
West Indian Ocean ◽  
First Time ◽  
North Western

The present report provides information on 20 pontoniine shrimp taxa from the island of Socotra, collected by Dr Michael Apel, including two new species, of the genera Dactylonia Fransen and Periclimenoides Bruce. Thirteen species are reported from Yemen for the first time, 8 are newly recorded from the north western Indian Ocean. The record of Periclimenoides is the first occurrence of this genus in the western Indian Ocean. The number of pontoniine shrimps known from the north west Indian Ocean is now increased from 32 to 44 taxa.

Piracy and Maritime Security in the North-Western Indian Ocean: From the Gulf of Oman to the Waters off the Somali Coast

2021 ◽  
pp. 097508782110492
Author(s):  
Rulah Odeh Alsawalqa ◽  
Denis Venter
Keyword(s):  
Indian Ocean ◽  
Task Force ◽  
Western Indian Ocean ◽  
Routine Activity Theory ◽  
Maritime Security ◽  
Routine Activity ◽  
Gulf Of Oman ◽  
North East ◽  
The North ◽  
North Western

There are a daunting number of maritime security threats and challenges in the north-western Indian Ocean region, both extant and potential. Indeed, the mere fact that the Indian Ocean constitutes the world’s largest swath of maritime space that is prone to the major menace of piracy (in the Gulf of Oman, the Arabian Sea, the Gulf of Aden and in the waters off the north-east African coastline), as well as the sporadic threat of terrorism (by Islamic militias of Al-Shabaab in Somalia and Al-Qaeda in the Arabian Peninsula in Yemen), signifies that the region will arguably remain the maritime area with the greatest array of security challenges. However, while anti-piracy measures ought to have shaped regional policymaking, and the resources that a large and diverse group of states has devoted to addressing these maritime challenges have never been adequate to the task, largely successful coalition-building exercises and joint naval task-force operations have been encouraging. The transformation of Somali piracy from a haphazard activity into a highly organised, professionalised criminal enterprise is briefly elucidated by greed-grievance theory and supplemented by the theory of crime, also known as routine-activity theory.

scholarly journals Tigriopus iranicus sp. nov., a new species of Harpacticidae (Copepoda, Crustacea) from Iran, with a redescription of T. raki Bradford, 1967

ZooKeys ◽  
2021 ◽  
Vol 1035 ◽  
pp. 115-144
Author(s):  
Fatemeh Nazari ◽  
Omid Mirshamsi ◽  
Pedro Martínez Arbizu
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Rock Pools ◽  
The North ◽  
Iranian Coast ◽  
North Western ◽  
A New Species

The first representative of Tigriopus Norman, 1869 from the north-western Indian Ocean is described from rock pools on the Iranian coast. Tigriopus iranicussp. nov. is distinguishable from its congeners by i) the possession of two maxillary endites, each with two setae; ii) a two-segmented mandibular endopod; iii) P1enp-3 with one pinnate claw, a well-developed geniculate spine and a small seta; and iv) female P6 with two setae. Additionally, we present a complete redescription of Tigriopus raki Bradford, 1967 on the basis of paratype material and a key to the species of the genus.

scholarly journals The genus Lithophyllum in the north-western Indian Ocean, with description of  L. yemenense sp. nov., L. socotraense sp. nov., L. subplicatum comb. et stat. nov., and the resumed L. affine, L. kaiseri, and L. subreduncum (Rhodophyta, Corallinales)

Phytotaxa ◽  
2015 ◽  
Vol 208 (3) ◽  
pp. 183 ◽  
Author(s):  
DANIELA BASSO ◽  
ANNALISA CARAGNANO ◽  
Line Le Gal ◽  
GRAZIELLA RODONDI
Keyword(s):  
Indian Ocean ◽  
Sequence Data ◽  
Western Indian Ocean ◽  
Type Specimens ◽  
The North ◽  
Pore Opening ◽  
Modern Context ◽  
The Mean ◽  
North Western ◽  
Number Of Cells

Based on literature, the genus Lithophyllum was represented in the whole Indian Ocean by 14 taxa, mostly in need of revision in a modern context. Molecular analyses integrated with morpho-anatomical comparisons between the recently revised type material of Lithophyllum kotschyanum Unger, and the related infraspecific taxa, lead to a resumption of L. affine, L. kaiseri, and L. subreduncum, and the description of L. socotraense sp. nov., L. yemenense sp. nov., and L. subplicatum comb. et stat. nov. Detailed accounts are provided for each species, including keys, along with information on synonymy, examined collections, distribution, habitat as well as sequence data of the 5’ end of the LSU from the type specimens. The anatomical features of the tetrasporangial conceptacle that were considered collectively diagnostic for species identification are: the mean diameter of the tetrasporangial conceptacles, the length of the pore-canal in the tetrasporangial conceptacles (with the number of cells in roof filaments), the occurrence of a depression at the top of the conceptacle roof in relation to the pore opening, and the number of cells from the floor of the tetrasporangial conceptacle chamber to the thallus surface. This study provides evidence of a previously unsuspected diversity within the Red Sea and NW Indian Ocean species of Lithophyllum.

Why Does Western Indian Ocean Circulation Connectivity Matter?

2021 ◽  
Author(s):  
Stephen Kelly ◽  
Ekaterina Popova ◽  
Zoe Jacobs
Keyword(s):  
Indian Ocean ◽  
Ocean Circulation ◽  
Western Indian Ocean ◽  
Ocean Model ◽  
Marine Conservation ◽  
Surface Currents ◽  
Resource Exploitation ◽  
Larval Stages ◽  
The North ◽  
Particle Tracking Method

<p>Marine circulation connectivity describes the pathways and timescales over which spatially separated parts of the ocean are connected by oceanic currents. In the Western Indian Ocean (WIO), these pathways and associated timescales are characterised by pronounced seasonal and interannual variability, including monsoon-driven reversal of surface currents in the northern part of the basin.</p><p>Understanding the connectivity timescales in the WIO – and their variability – is important for a multitude of reasons. Ecological connectivity between coral reefs is necessary to maintain their biodiversity, understanding downstream connectivity from marine resource exploitation sites is important to understand which areas are likely to be affected, and circulation connectivity is a key concern when designing marine conservation measures. For example, establishing an effective network of marine protected areas (MPAs) requires that they are connected on ecologically relevant timescales (e.g. the duration of species’ pelagic larval stages), but gaps in the existing MPA network mean that decisions need to be undertaken about which areas to prioritise for future protection. Therefore, knowledge of the advective pathways connecting the WIO over these timescales is essential for effective management of the region.</p><p>Here, a Lagrangian particle tracking method is used in conjunction with a 1/12° resolution ocean model to elucidate the advective pathways mediated by major surface currents in the WIO. Model experiments are performed with virtual particles released into several major WIO currents and tracked for 100 days, and the resulting trajectories are analysed. Significant variability was found, with advective pathways and timescales sensitive to both season and year of release. The main differences are associated with the different monsoon regimes driving changes in connectivity timescales, and reversing direction of advective pathways in the north of the WIO. In addition to this seasonal variability, interannual changes are explored. Case studies of anomalous connectivity pathways / timescales are presented and discussed in the context of extremes in forcing and larger scale variability, including the Indian Ocean Dipole.  </p>

New genera, species and occurrence records of Goniasteridae (Asteroidea; Echinodermata) from the Indian Ocean

Zootaxa ◽  
2018 ◽  
Vol 4539 (1) ◽  
pp. 1 ◽  
Author(s):  
CHRISTOPHER L. MAH
Keyword(s):  
Indian Ocean ◽  
Deep Sea ◽  
Western Indian Ocean ◽  
Gut Contents ◽  
New Genera ◽  
Late 20Th Century ◽  
The North ◽  
Marine Habitats ◽  
The Indian Ocean ◽  
Occurrence Records

Modern goniasterids are the most numerous of living asteroids in terms of described genera and species and they have important ecological roles from shallow to deep-water marine habitats. Recent MNHN expeditions and historical collections in the USNM have resulted in the discovery of 18 new species, three new genera and multiple new occurrence records from the western Indian Ocean region including Madagascar, Glorioso and Mayotte islands, Walters Shoal, South Africa, and Somalia. This report provides the first significant contribution to knowledge of deep-sea Asteroidea from the Indian Ocean since the late 20th Century. Several deep-sea species, previously known from the North Pacific are now reported from the western Indian Ocean. Gut contents from Stellaster and Ogmaster indicate deposit feeding. Feeding modes of this and other deep-sea species are discussed. Comments are made on fossil members of included taxa. A checklist of Indian Ocean Goniasteridae is also included.

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